Cosmic Princess Kaguya!

At 17, Iroha Sakayori is barely surviving near-future Tokyo — school, part-time jobs, barely holding it together. Her one escape is Tsukuyomi, a virtual world where people build, create, and live second lives, run by a popular streamer named Yachiyo Runami. Then one night, Iroha finds a glowing electrical pole with a baby inside, because apparently that's how things work now. The baby rapidly ages into a girl called Kaguya, who says she's from the Moon and she's not going back — she hated how her original folktale ended and wants to rewrite her own story on Earth. From there, Kaguya drags Iroha into the competitive side of Tsukuyomi, where they enter the Yachiyo Cup, a streamer tournament built around music performances and creative battles. There are rival crews to deal with, including Black OnyX and their leader Akira Mikado, who has history with Iroha. Studio Colorido handles this as an ONA, and the virtual concert sequences have a fluidity that feels like what you'd get if Macross Frontier met Vivy: Fluorite Eye's Song inside a VR chatroom. The soundtrack leans into Vocaloid producer territory, which fits the whole digital-stage aesthetic perfectly. If you liked the virtual world stakes of Sword Art Online but wished it leaned harder into music and Japanese mythology instead of swords, this is worth your time. It's folklore remixed through a neon-lit, very online lens.